Alloy.



UNITED STATES PATENT oFFioE;

WALTER RUBEL, OF HAMBURG, GERMANY.

ALLOY.

. Specification 0! Letters Patent- Iaten'ted'Deci 15, 1908.

Application filed m 28, 1907. Serial No. 376,163.

'wear and tear es ecially causing great exense with steel 0 inferior density.

'All kinds of methods have been tried for the production of steel suitable for the above mentioned purposes, for instance different other metals have been added to rou h steel in greater or smaller quantities; all t ese efforts were however unsuccessful. By my process however extremely dense steel without fissures or cracks-but of great stren h is reduced, showing a high limit of elasticity.

o-obtain suchste'ell meltiron and nickel or v 11011 and manganese, or iron, tungsten and chromium in such proportions together, as to 1 represent their atomic weights and then add loy.

ass is em lo ed'.

3% of vanadium-carbid tothe alloy, formed by melting. r

I em loy chemically pure iron for my 51 e addition of carbid of vanadium increases the temper and strength of theme terial in an unforseen manner, especially at high temperature, giving. a perfectly equal and fine-grained structure.

It is not absolutely-necessary, to mix the several 'partsin. atomic proportions, vanadium carbid having the general effect. of im-v proving other kinds of steel allo s, provided not more than 3% is added. he bestresultshowever are obtained if the above proc- Inste 0 adding vanadium-carbid to the allo s containing, no carbon-0r at least very sma quantities ofcarbon, vanadium alone which case the vanadium the formation of the vanadium-carbid.

vanadium and carbon to allow of- The quantity of vanadium contained in the alloy should not exceed a certain proportion, 0.3 to 3% being the most favorable.

'If I wish to obtain for instance steel of a strength as to bear 150 kg. for each square millimeter. and of 10 elongation or extension, I first melt the necessary quantity of iron with the nickel, mixing them m such manner, as to have 0.9% of carbon. In melting the percentageis reduced to 0.5,

then I add 1.05 of vanadium either as vanadium oras ferro-vanadium and allow the The slag alloy to boil for about two hours.

leavformed absorbs part of the vanadium, ing but about 1 in the alloy.

Supposing the formula of the-vanadiumcarbid to be VG and the atomic'weights of to be 51.2' and 12, the above mentioned quantities are sufficient to allow of the formation of vanadium-carbid'. I roceed in exactly the same manner, if the al 0y is to contain chrome, manganese or tun sten instead of nickel.

- ickel-steel reduced according .to this process shows t e above mentioned strength, which has not yet been obtained by other processes, having at the same'time a comparatively small elongation or extension and a high limit of elasticity; especially great advantage consists, in that such steel can be hardened 0r cemented in.a cold current of air, which renders 1t espec ally suit- I able for armor-plates, which can only be har-' dened on one side. I

What I claim as m invention and desire to secure b Letters atent is: v

1. An a oy of iron-and another. metal in proportions representing their atomic weights, with vanadium carbid,

2. An alloy of iron and nickel wlth' vanadium carbid.

v 3. An alloy of iron and nickel in propertions representing their atomic weights, wlt vanadium carbid.

In witness whereof, I subscribe my signature, in presence of 'two .witnesses.

JWALTER RUBEL.

I Witnesses: a

, Ennns'r H. L. Mouunnnor'r,

O'rro 'W. Hmlmmron. 

